Excavator parts Hydraulic Pump YA00003081 4455484 4424246 For Hitachi EX2500-6 EX5500

The hydraulic pump is a vital component in excavators, converting mechanical power into hydraulic energy to operate cylinders, motors, and other actuators. It ensures efficient power transmission, enabling precise control and high performance in digging, lifting, and material handling applications.

Working pressure, measured in megapascals (MPa) or bars (bar), indicates a pump's maximum output pressure, directly determining the thrust or torque a hydraulic system can generate. Standard gear pumps typically operate at 16-21MPa, while high-performance piston pumps reach 35-42MPa.

Higher pressures enable hydraulic cylinders and motors to generate greater force, allowing excavators to lift heavier loads or dig tougher materials. However, high pressure also demands better seals and piping, increasing leakage risks. Modern excavator hydraulic systems typically operate at 30-35MPa, balancing power and reliability.

Efficiency: The Hidden Factor Affecting Fuel Economy

Hydraulic pump efficiency comprises volumetric and mechanical efficiency. Volumetric efficiency compares actual to theoretical flow rate, primarily affected by internal leakage. Mechanical efficiency measures how much input power converts to hydraulic power, mainly influenced by frictional losses. Combined total efficiency can exceed 90% in quality piston pumps.

Though less visible than displacement or pressure, efficiency significantly impacts excavator fuel consumption. Efficient hydraulic pumps reduce energy loss, lowering engine load and saving fuel. This explains why high-end excavators invest more in high-efficiency piston pumps.

GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.

Our main products are Excavator Hydraulic spare parts, Hydraulic pump, Swing motor, Travel motor, Final drive, Swing gearbox, Travel gearbox, Control valve,Monitor,Controller, Hydraulic cylinder and other hydraulic items with genuine and aftermarket quality. Until now, our products enjoy high reputation all over the world and have been exported to more than 150 countries and regions, spreading all over the Middle East, Southeast Asia, Africa, North America, South America, Europe and Oceania with its own brand "Belparts" are widely acclaimed by foreign customers.

In February 2023, Belparts Yunnan Tourism Team Building

In April 2024, Belparts participated in the Brazil Construction Machinery Exhibition and visited local clients in Brazil.

In April 2024, Belparts participated in the French Construction Machinery Exhibition and visited clients in France and Spain

In May 2024, Belparts Travel Thailand